Certificate of authenticity · Verification code ZXNLYE7ZVX · Version 1
Lemon Law V (AEI23) - Revisited
Tim Berresheim
| Inventory number | TB19/F 252/1 |
|---|---|
| Year | 2019 |
| Technique | Archival Print auf Fine-Art-Papier |
| Dimensions | 60 × 50 cm |
| Edition | 1/10 |
| Issued | 13.11.2026, 08:05 |
Timestamp anchored in Bitcoin, block 975648.
Verification
- …Checksum of the certificate file
- …Artist’s signature
- …Timestamp in Bitcoin
- ·ImageDrop the image file here to compare it with the certificate.
Drop a file here: image, certificate (.json), signature (.sig) or timestamp (.ots). Nothing is uploaded; everything is computed in your browser.
Verification data
- SHA-256 of the certificate file
ef006665975b37a4cddcb20b48d436be04154f7f859f4a1930c916b57cff2f34- Signature (Ed25519, Base64)
MfwSkOLiLGZy3VrUs3aRteSUcBn2llHVp4sZ8qQ3h1SAMZqvQbWgpg2LXx1hRa+AeXFWkoVEDOpzQZ4gTNe7CQ==- Artist’s public key
0a347c3cdcf869a45213eb6eea4e65d4f60adb6d1fe7d9be59eace1f04584708- SHA-256 of the main image
87c89f580be96657931f83d7730b83f46025151db2a6bceed5967d65e04438b0
How to verify this independently of this page: hash the JSON file with SHA-256; the value must match the checksum above. Verify the signature against that checksum with the public key (Ed25519). Check the .ots file together with the JSON file at opentimestamps.org: this proves since when the checksum has been in the Bitcoin blockchain. The proof depends neither on this address nor on the artist, only on certificate, key and blockchain.